250 " mL of " x M solution and 500 " mL of " y M solution of a solute are mixed and diluted to 2L to produce a final concentration of 1.6 M. If `x:y=5:4`, calculate x and y.

Explanation

(iii). `250 mLxx x+500 mL xxy=1.6Mxx2000mL`
`x+2y=12.8` ……(i)
`(x)/(y)=(5)/(4)`
`4x=5y`
`x=(5)/(4)y`
putting the value of x I equation (i), we get
`(5)/(4)y+2y=12.8`
`x=4.93M,y=3.94M`